| SS | BOD | Ratio SS/BOD |
No of obs. | 35 | 44 | 35 |
| mg/l | mg/l | mg/l |
Max. value | 72 | 140 | 1.2 |
Mean value | 50 | 87 | 0.57 |
Median value | 48 | 90 | 0.55 |
Min. value | 30 | 50 | 0.29 |
Standard error | 11.42 | 20.52 | 0.19 |